(1) Electronmicroscopical investigations have revealed that, under normal conditions, a minor vesicular transfer of intravenously injected peroxidase occurs across the endothelium in segments of arterioles, capillaries and venules, especially in arterioles with a diameter about 15-30 mu.
(2) This study examined the immunohistochemical findings in renal arterioles from biopsy specimens, and related the findings to those of light and electron microscopy.
(3) Normally, the small longitudinal (arterioles to venules) gradient of microvascular and perimicrovascular pressures is not a major concern, but in nonuniform disease processes, such as microembolism, longitudinal inhomogeneity, and parallel inhomogeneity are dominant.
(4) Glial siphoning can distribute the potassium preferentially toward the blood vessels in the area, leading to an elevation in potassium concentration in the ECF surrounding the vascular smooth muscle of the arterioles.
(5) From these experiments it is concluded that vascular A1 and A2 adenosine receptors are present in the kidney and that activation of A1 receptors is associated with preglomerular vasoconstriction only, whereas activation of A2 receptors mediates pre- and postglomerular vasodilation with a lack of vasodilatory response of the distal afferent arteriole.
(6) Consistent with these observations, L-NMMA treatment significantly attenuated Ach-induced vasodilation in 4th-order arterioles, but it had no effect on 2nd-order arterioles.
(7) Neither the first- (A1) or second-order arterioles (A2) nor the first- (V1) or second-order venules (V2) constricted significantly to angiotensin II.
(8) The criteria selected by a classification tree method were similar: palpable purpura, age less than or equal to 20 years at disease onset, biopsy showing granulocytes around arterioles or venules, and gastrointestinal bleeding.
(9) In norepinephrine-contracted afferent arterioles, CGRP, but not SCT, produced a concentration-dependent relaxation [50% maximal dose, (EC50) = 1.3 nM].
(10) Simultaneously, reactivity of pial arteriole was observed and its diameter was measured through the cranial window using intravital microscope and width analyzer.
(11) Three mechanisms are held responsible for the resistance increase: (1) a rarefaction of the smallest arterioles and capillaries, (2) an increased wall to lumen ratio and (3) a decreased internal diameter.
(12) The anatomical arrangement of the pia mater suggests that it may act as a regulatory interface between cerebrospinal fluid and the surface of the brain and between arterioles within the brain and the surrounding neural tissue.
(13) Metabolism-mediated vasodilatation, with adenosine as principal mediator, essentially concerns the small-caliber intramyocardial arterioles and is the predominant regulatory system in normal subjects.
(14) The ciliary process vasculature consists of three different vascular territories with discrete arterioles and venules.
(15) These findings suggest that total acute denervation significantly increases the diameter of small arteries and arterioles, thereby decreasing the resistance in the arterial bed and increasing blood flow.
(16) SK-827 tended to dilate smaller arterioles more markedly than larger arterioles, and larger arterioles than small arteries.
(17) The coupling together of 10 nephrons per se impairs autoregulation of renal blood flow compared to that of a single nephron model, but this effect is more than outweighed by greater control resistance in deep arterioles.
(18) EABF was obtained by timed complete collection of blood from superficial efferent arterioles.
(19) However, large- (1A) and intermediate- (2A) sized arterioles dilated proportionately more in TR than in SED rats during 1- to 8-Hz muscle contractions, even though the passive mechanical properties (circumference-passive wall tension relationships) were similar between groups.
(20) At two days, the intrarenal vascular system distal to the afferent arteriole is strikingly different than that of the adult.
Artery
Definition:
(n.) The trachea or windpipe.
(n.) One of the vessels or tubes which carry either venous or arterial blood from the heart. They have tricker and more muscular walls than veins, and are connected with them by capillaries.
(n.) Hence: Any continuous or ramified channel of communication; as, arteries of trade or commerce.
Example Sentences:
(1) In contrast, arteries which were exposed to CO showed a higher uptake of cholesterol as compared to their corresponding control.
(2) Direct fetal digitalization led to a reduction in umbilical artery resistance, a decline in the abdominal circumference from 20.3 to 17.8 cm, and resolution of the ascites within 72 h. Despite this dramatic response to therapy, fetal death occurred on day 5 of treatment.
(3) Arterial compliance of great vessels can be studied through the Doppler evaluation of pulsed wave velocity along the arterial tree.
(4) We conclude that chronic emphysema produced in dogs by aerosol administration of papain results in elevated pulmonary artery pressure, which is characterized pathologically by medial hypertrophy of small pulmonary arteries.
(5) Following central retinal artery ligation, infarction of the retinal ganglion cells was reflected by a 97 per cent reduction in the radioactively labeled protein within the optic nerve.
(6) Each process has been linked to the regulation of cholesterol accretion in the arterial cell.
(7) The adjacent gauge was separated from the ischemic segment by one large nonoccluded diagonal branch of the left anterior descending artery.
(8) Of 19 patients with coronary artery disease and "normal" omnicardiograms, only 8 (42%) had normal ventricular angiography.
(9) The main finding of this study is that diabetic adolescents with a high erythrocyte Na,Li countertransport rate have an arterial pressure significantly higher than patients with normal Na,Li countertransport fluxes.
(10) All the women had vaginal ultrasound velocimetry studies in both mainstem uterine arteries through the parametrium before the surgical procedure and again after the procedure.
(11) The origin of the aorta and pulmonary artery from the right ventricle is a complicated and little studied congenital cardiac malformation.
(12) The remaining case had a calibre persistent submucosal artery within the caecum that was found incidentally in a resection specimen.
(13) In patients with coronary artery disease, electrocardiographic signs of left atrial enlargement (LAE-negative P wave deflection greater than or equal to 1 mm2 in lead V1) are associated with increased left ventricular end diastolic pressure (LVEDP).
(14) Concentrations of several gastrointestinal hormonal peptides were measured in lymph from the cisterna chyli and in arterial plasma; in healthy, conscious pigs during ingestion of a meal.
(15) Using multiple regression, a linear correlation was established between the cardiac index and the arterial-venous pH and PCO2 differences throughout shock and resuscitation (r2 = .91).
(16) We studied the hemodynamic changes caused by bronchoscopy under LA in mechanically ventilated patients and the effect of LA on the endoscopic decline in arterial pO2.
(17) The article describes an unusual case with development of a right anterior mediastinal mass after bypass surgery with internal mammary artery grafts.
(18) Arteries treated with atrial natriuretic peptide showed no alterations in relaxation or cGMP content after incubation with pertussis toxin.
(19) Myocardial ischaemia was induced in perfused rabbit hearts by ligating the left main coronary artery.
(20) Arterial oxyhaemoglobin saturation (SaO2) was monitored continuously during normal labour in 33 healthy parturients receiving pethidine and nitrous oxide for analgesia.